<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      display: grid;
      grid-template-columns: repeat(3, 100px);
      grid-template-rows: repeat(2, 100px);
      gap: 10px;
      background-color: red;
    }
    .item {
      border: 1px solid #333;
      background-color: #fff;
    }
    .item1 {
      grid-column: 1 / 3;
    }
    .item2 {
      grid-column: 3 / 4;
      grid-row: 1 / 3;
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
    <div class="item item4">4</div>
  </div>
</body>
</html>